Abstract
Accurate knowledge of electron transport properties is vital to understanding the information provided by liquid argon time projection chambers (LArTPCs). Ionization electron drift-lifetime, local electric field distortions caused by positive ion accumulation, and electron diffusion can all significantly impact the measured signal waveforms. This paper presents a measurement of the effective longitudinal electron diffusion coefficient, DL, in MicroBooNE at the nominal electric field strength of 273.9 V/cm. Historically, this measurement has been made in LArTPC prototype detectors. This represents the first measurement in a large-scale (85 tonne active volume) LArTPC operating in a neutrino beam. This is the largest dataset ever used for this measurement. Using a sample of ∼70,000 through-going cosmic ray muon tracks tagged with MicroBooNE's cosmic ray tagger system, we measure DL = 3.74+0.28-0.29 cm2/s.
Original language | English (US) |
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Article number | P09025 |
Journal | Journal of Instrumentation |
Volume | 16 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2021 |
Keywords
- Charge transport and multiplication in liquid media
- Noble liquid detectors (scintillation, ionization, double-phase)
- Time projection Chambers (TPC)
ASJC Scopus subject areas
- Instrumentation
- Mathematical Physics